org.neo4j.graphdb

Interface DependencyResolver.SelectionStrategy

Enclosing interface:

DependencyResolver

public static interface DependencyResolver.SelectionStrategy

Responsible for making the choice between available candidates.

Field Summary

Fields

Modifier and Type	Field and Description
static DependencyResolver.SelectionStrategy	FIRST
static DependencyResolver.SelectionStrategy	ONLY Returns the one and only dependency, or throws.

Method Summary

Modifier and Type	Method and Description
<T> T	select(Class<T> type, Iterable<? extends T> candidates) Given a set of candidates, select an appropriate one.

Field Detail

FIRST

static final DependencyResolver.SelectionStrategy FIRST

ONLY

static final DependencyResolver.SelectionStrategy ONLY

Returns the one and only dependency, or throws.

Method Detail

select

<T> T select(Class<T> type,
             Iterable<? extends T> candidates)
      throws IllegalArgumentException

Given a set of candidates, select an appropriate one. Even if there are candidates this method may throw IllegalArgumentException if there was no suitable candidate.

Type Parameters:

T - the type of items

Parameters:

type - the type of items.

candidates - candidates up for selection, where one should be picked. There might also be no suitable candidate, in which case an exception should be thrown.

Returns:

a suitable candidate among all available.

Throws:

IllegalArgumentException - if no suitable candidate was found.